[Ossification of the stapedius tendon as a rare cause of conductive hearing loss].

Ossification of the stapedial tendon is a very rare cause of conductive hearing loss. In addition to a review of the literature, two further cases of unilateral hearing impairment are reported. In both cases, division of the ossified tendon led to a complete disappearance of the middle-ear problem. Apart from middle ear malformations, infections of the middle ear may also give rise to ossification of the stapedial tendon.